LTC3728LCGN-PBF Datasheet, PDF (34/38 Pages) Linear Technology – Dual, 550kHz, 2-Phase Synchronous Regulators

LTC3728L/LTC3728LX
typical applications
0.1µF
180pF
20k
1%
105k
1000pF
1%
0.01µF
10k
1000pF
100pF
f_SYNC
8.06k _1500pF
100pF
3.3V
4.75k
20k
1%
1000pF
180pF
63.4k
1%
1000pF
RUN/SS1
SENSE1⁺
SENSE1^–
PGOOD
TG1
SW1
V_OSENSE1
PLLFLTR
PLLIN
BOOST1
V_IN
BG1
FCB
EXTV_CC
LTC3728L/LTC3728LX
I_TH1
INTV_CC
SGND
PGND
3.3V_OUT
I_TH2
V_OSENSE2
SENSE2^–
SENSE2⁺
BG2
BOOST2
SW2
TG2
RUN/SS2
V_PULL-UP
(<7V)
PGOOD
L1
4.3µH
0.008Ω
0.1µF
PIN 4 _M1
Q1
Q2
1µF 50V
CMDSH-3TR
10Ω
0.1µF
1µF _{4.7µF, 10V}
CMDSH-3TR
22µF
50V
150µF, 6.3V
1µF 50V
180µF, 4V
0.1µF
PIN 4
M2
Q3
Q4
L2
4.3µH
0.008Ω
V_OUT1
5V/4A
GND
V_IN
7V TO
28V
V_OUT2
3.3V/5A
0.1µF
V_IN: 7V TO 28V
V_OUT: 5V, 4A/3.3V, 5A
SWITCHING FREQUENCY = 250kHz TO 550kHz
M1, M2: FDS6982S OR VISHAY Si4810DY
L1, L2: SUMIDA CDEP105-4R3MC-88
OUTPUT CAPACITORS: PANASONIC SP SERIES
3728 F13
Figure 13. LTC3728L/LTC3728LX 5V/4A, 3.3V/5A Regulator with External Frequency Synchronization
3728lxff
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